CN106677427B - A kind of rigid wall air bearing eccentrically compressed member - Google Patents
A kind of rigid wall air bearing eccentrically compressed member Download PDFInfo
- Publication number
- CN106677427B CN106677427B CN201611221342.1A CN201611221342A CN106677427B CN 106677427 B CN106677427 B CN 106677427B CN 201611221342 A CN201611221342 A CN 201611221342A CN 106677427 B CN106677427 B CN 106677427B
- Authority
- CN
- China
- Prior art keywords
- fan
- holding force
- rigid pipe
- shaped
- force plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C2003/026—Braces
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Air Bags (AREA)
Abstract
It the present invention relates to a kind of rigid wall air bearing eccentrically compressed member, is set in Circular Rigid pipe there are three fan-shaped rigid pipe, each sector rigid pipe is interior to be equipped with a fan-shaped air bag, and both ends are equipped with fan-shaped holding force plate；Each sector air bag is equipped with installation charging valve and barometrical communication port, and charging valve and air pressure meter pass through Circular Rigid pipe and air bag aeration aperture on fan-shaped rigid pipe respectively and barometer intercommunicating pore is connect with sector air bag；The both ends of Circular Rigid pipe are threadedly coupled with threaded cap, and round holding force plate is equipped in threaded cap, is equipped with transmission rod between round holding force plate and fan-shaped holding force plate.The present invention converts rigid wall tensile stress for the eccentricity pressure of eccentrically compressed member by air bag pressure-bearing, makes full use of the tensile strength of rigid wall material, and the rigid wall of eccentrically compressed member is made to be not subject to compression, improves the eccentric compression stability of rod piece.
Description
Technical field
The invention belongs to the member arts in engineering structure, are related to a kind of rigid wall air bearing eccentrically compressed member.
Background technique
The spatial mesh structures such as rack, reticulated shell form is equal in stadiums, railway station, terminal and some unique constructions
There is extensive application.Spatial mesh structure is to be composed of the rigid bar of different length by certain topological relation.Practical knot
Rod piece in structure bears certain Moment usually based on axially loaded, i.e. rod piece in spatial mesh structure
It is an eccentric compression or eccentric tension rod piece.For eccentric tension rod piece, it can be mentioned by using high-strength material
The tensile capacity of high rod piece, and the bearing capacity of eccentrically compressed member is then by stability control, the strength of materials is eccentric to improving
The bearing capacity of compression member influences little.It being limited by slenderness ratio, compression member cannot preferably transmit the pressure of relatively long distance,
In addition, the application which also limits high-strength materials in spatial mesh structure.
For the eccentric compression bearing capacity for improving eccentrically compressed member in engineering structure, high-strength material is made full use of, having must
A kind of rod piece of new model is invented, the rod piece of form eccentric compression stability with higher can make full use of material
Tensile strength, to achieve the purpose that improve eccentrically compressed member bearing capacity.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of rigid wall air bearing eccentrically compressed member, pass through gas
The eccentricity pressure of eccentrically compressed member is converted rigid wall tensile stress by capsule pressure-bearing, makes full use of the tensile strength of rigid wall material, makes
The rigid wall of eccentrically compressed member is not subject to compression, improves the eccentric compression stability of rod piece.
Technical solution
A kind of rigid wall air bearing eccentrically compressed member, it is characterised in that including Circular Rigid pipe 1, fan-shaped rigid pipe 5, air bag 7,
Round holding force plate 3, fan-shaped holding force plate 6, transmission rod 4, charging valve 8, barometer 9 and threaded cap 2；It is equipped in Circular Rigid pipe 1
Three fan-shaped rigid pipes 5, each sector rigid pipe 5 is interior to be equipped with a fan-shaped air bag 7, and both ends are equipped with fan-shaped holding force plate 6；Each fan
Shape air bag 7 is equipped with installation charging valve and barometrical communication port, charging valve 8 and barometer 9 pass through Circular Rigid respectively
Pipe 1 and air bag aeration aperture on fan-shaped rigid pipe 5 and barometer intercommunicating pore are connect with sector air bag 7；The both ends of Circular Rigid pipe 1
It is threadedly coupled with threaded cap 2, round holding force plate 3 is equipped in threaded cap 2, is equipped with power transmission between round holding force plate 3 and fan-shaped holding force plate 6
Bar 4, and transmission rod 4 is hinged with fan-shaped holding force plate 6 and round holding force plectane 3 respectively；The sector holding force plate and fan-shaped rigid pipe
Inner wall sliding contact；The circle holding force plate and the sliding contact of Circular Rigid inside pipe wall；The reserved circle in the center of the threaded cap
The through-hole that holding force plate is connect with the external world, diameter are less than round holding force board diameter.
3 air bag aeration apertures and 3 barometer intercommunicating pores are respectively uniformly distributed on 2 circumference, and each pair of air bag fills
Stomata and barometer intercommunicating pore are axially corresponded in Circular Rigid pipe, and the circle center distance between the two is not less than 3 times of maximums diameter of hole.
The central angle of the sector rigid pipe and air bag 7 is 120 degree.
The transmission rod is a rigid solid or hollow quarter butt structure.
Beneficial effect
A kind of rigid wall air bearing eccentrically compressed member proposed by the present invention, by air bag pressure-bearing by the bias of eccentrically compressed member
Pressure is converted into rigid wall tensile stress, makes full use of the tensile strength of rigid wall material, and the rigid wall of eccentrically compressed member is made to be not subject to press
Stress improves the eccentric compression stability of rod piece.Have compared with the rod piece applied in existing space network following beneficial
Effect：
1, the present invention converts 3 for the eccentricity pressure of whole rod piece by round holding force plate and transmission rod connected to it
The axial pressure of fan-shaped air bag, and then it is converted into the tensile stress of fan-shaped rigid pipe and Circular Rigid pipe, fan-shaped rigid pipe and circle
Rigid pipe is not subjected to compression, improves the entirety and local stability of eccentrically compressed member, and then improve the inclined of rod piece
Heart compression bearing.
2, since the eccentrically compressed member of the form has preferable stability, biggish axial pressure can be born
And Moment at End, and then improve whole structural stability.
3, since fan-shaped rigid pipe and Circular Rigid pipe are subjected only to tensile stress, high-strength material can be made full use of
Improve the eccentric compression bearing capacity of rod piece.When fan-shaped rigid pipe and Circular Rigid pipe use high-strength material, inside and outside rod piece just
Wall can be made thinner lighter, to reduce the transportation cost and dead load of component.
4, structure of the invention form is simple, easily operated, safety economy, has good market application prospect.
Detailed description of the invention
Fig. 1 is just wall air bearing eccentrically compressed member perspective view of the invention；
Fig. 2 is just wall air bearing eccentrically compressed member longitudinal sectional drawing of the invention；
Fig. 3 is just wall air bearing eccentrically compressed member transverse cross-sectional view of the invention；
Fig. 4 is just wall air bearing eccentrically compressed member Circular Rigid pipe schematic diagram of the invention；
Fig. 5 is just wall air bearing eccentrically compressed member sector rigid pipe schematic diagram of the invention；
Fig. 6 is just wall air bearing eccentrically compressed member sector holding force plate schematic diagram of the invention；
Fig. 7 is just wall air bearing eccentrically compressed member threaded cap schematic diagram of the invention；
Fig. 8 is just wall air bearing eccentrically compressed member circle holding force plate schematic diagram of the invention；
Fig. 9 is just wall air bearing eccentrically compressed member air bag schematic diagram of the invention；
Figure 10 is just wall air bearing eccentrically compressed member circle holding force plate stress diagram of the invention；
In figure：1- Circular Rigid pipe, 2- threaded cap, 3- circle holding force plate, 4- transmission rod, 5- sector rigid pipe, 6- are fan-shaped
Holding force plate, 7- air bag, 8- charging valve, 9- barometer, 10- barometer communication port.
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described：
The present invention uses following implementer's case：Rigid wall air bearing eccentrically compressed member perspective view, longitudinal sectional drawing and cross
Fig. 1-3, including Circular Rigid pipe 1 (see Fig. 4), threaded cap 2 (see Fig. 7), round holding force plate 3 (see Fig. 8), power transmission are seen to sectional view
Bar 4, fan-shaped rigid pipe 5 (see Fig. 5), fan-shaped holding force plate 6 (see Fig. 6), air bag 7 (see Fig. 9), charging valve 8, barometer 9, air pressure
Count intercommunicating pore 10.
The Circular Rigid pipe is the higher hollow circular-tube of the strength of materials, and both ends outer wall has screw thread, on Qi Gangbi
3 air bag aeration apertures and 3 barometer intercommunicating pores are reserved with, 3 air bag aeration apertures and 3 barometer intercommunicating pores uniformly divide respectively
Cloth is on 2 circumference, and air bag aeration aperture and barometer intercommunicating pore are axially corresponded in Circular Rigid pipe, the distance of center circle between the two
From 3 times of maximums diameter of hole are not less than, design must be reinforced around hole.
The central angle of the sector rigid pipe is 120 degree, for the higher hollow pipe of the strength of materials, outside fan-shaped rigid pipe cylinder
Surface curvature is identical as Circular Rigid pipe internal surface curvature.Air bag aeration aperture is reserved at its cylinder circumferential direction center and barometer connects
Through-hole, and it is corresponding with Circular Rigid tube airbag aeration aperture and barometer intercommunicating pore, it needs to reinforce designing around hole.
The air bag is axially placed inside sector tube；The shape fan-shaped cylinder consistent with fan-shaped rigid pipe internal surface,
The good membrane material of air-tightness can be selected in material, and has certain intensity and shrinkage.Air bag is axial inside fan-shaped rigid pipe to be put
It sets, is preset with charging valve and barometer communication port, reserve aeration aperture with fan-shaped rigid pipe respectively and barometer is connected to hole site
It is corresponding.
The sector holding force plate is located at balloon ends and is inscribed within fan-shaped rigid inside pipe wall；Using with certain thickness sector
Plate, material can be steel or the other materials of better performances, be dimensioned slightly smaller than the inner face size of fan-shaped rigid pipe, fan-shaped holding force
Plate is answered smooth with the part that fan-shaped rigid inside pipe wall contact, guarantees that fan-shaped holding force plate can be in the axially free cunning of fan-shaped rigidity inside pipe wall
It is dynamic.
The circle holding force plate is located at fan-shaped rigid pipe both ends and is inscribed within Circular Rigid inside pipe wall；Using with certain thickness
Circular slab, material can be slightly less than Circular Rigid bore, round holding force for the other materials of steel or better performances, diameter
The part that plate is contacted with Circular Rigid pipe is answered smooth, guarantees that round holding force plate can be in the axially free sliding of Circular Rigid pipe.
The transmission rod is hinged with fan-shaped holding force plate and round holding force plate respectively；For a rigid solid or hollow quarter butt, palpus
It can bear the axial compressive force from round holding force plate and fan-shaped holding force plate.
The threaded cap is a kind of load transfer device, the pressure from round holding force plate can be passed to Circular Rigid pipe；?
Circular hole is reserved at the center of threaded cap, is connect for round holding force plate with the external world, hole diameter is than round holding force board diameter
It is small, guarantee that round holding force plate and threaded cap have enough power transmission areas.The screw thread specification of threaded cap and Circular Rigid pipe both ends
Screw thread specification matches.
The barometer is mounted on by the reserved barometer intercommunicating pore of Circular Rigid pipe, and passes through Circular Rigid pipe and sector
The reserved barometer intercommunicating pore of rigid pipe is connected to air bag；The threaded cap is threadedly coupled respectively with Circular Rigid pipe both ends.
It specifically assembles and is：Three fan-shaped rigid pipes 5 are disposed coaxially in Circular Rigid pipe 1,3 fan-shaped rigid pipes are made
Reserved air bag aeration aperture and barometer intercommunicating pore reserves air bag aeration apertures with 3 groups of Circular Rigid pipe respectively and barometer is connected to
Hole corresponds；3 air bags 7 are disposed coaxially in fan-shaped rigid pipe 5, the charging valve 8 of each air bag 7 both passes through sector
The reserved air bag aeration aperture of rigid pipe 5 and Circular Rigid pipe 1 is simultaneously fixed on Circular Rigid tube wall, the air pressure of each air bag 7
Meter intercommunicating pore 10 both passes through fan-shaped rigid pipe 5 and the reserved barometer intercommunicating pore of Circular Rigid pipe 1 is connected to barometer 9；6 pieces of fans
Shape holding force plate 6 is respectively placed in the both ends of 3 air bags 7, and every block of fan-shaped holding force plate 6 passes through transmission rod 4 and round 3 phase of holding force plate respectively
Even, 4 both ends of transmission rod and fan-shaped holding force plate and round holding force plate are hinged, finally by two threaded caps 2 and Circular Rigid pipe 1
Both ends are closely connected by screw thread.
When use：
After rigid wall air bearing eccentrically compressed member being installed according to above-mentioned technical proposal, be separately connected gas using inflator pump
Capsule charging valve 8, while three air bags 7 are inflated, it is inflated to air pressure in three air bags 7 and reaches scope of design, stop
Inflation.Three barometers 9 are used to monitor the air pressure of each air bag.When being inflated to air bag 7, air bag 7 increases with air pressure
And expand, pressure effect is generated to fan-shaped tube wall and the fan-shaped holding force plate 6 positioned at its both ends, fan-shaped holding force plate 6 is in air bag pressure
It is slided under power effect to fan-shaped rigid pipe both ends, gasbag pressure is further passed to circle by transmission rod 4 by fan-shaped holding force plate 6
Holding force plate 3, round holding force plate 3 slide under gasbag pressure effect to Circular Rigid pipe both ends, and are in close contact with threaded cap 2,
Gasbag pressure is finally passed into Circular Rigid pipe by threaded cap 2.Under this equilibrium state, the tube wall of fan-shaped rigid pipe 5 is only
Circumferential action of pulling stress is born, the tube wall of Circular Rigid pipe 1 bears circumferential tensile stress and axial tension stress effect simultaneously.
In normal operating conditions, which will receive from outer the rigid wall air bearing eccentrically compressed member of the present invention
The eccentricity pressure in portion acts on F0, eccentricity e0.Eccentricity pressure F0It acts directly on round holding force plate 3, in this case, circle
Shape holding force plate 3 bears the pressure F from 3 air bags 7 simultaneously1、F2、F3With the eccentricity pressure F from outside0, the two direction phase
Instead, in addition, round holding force plate 3 will also bear the non uniform pressure from threaded cap 2, top half threaded cap 2 and lower half portion
The resultant force that threaded cap 2 acts on round holding force plate 3 is respectively Fg1、Fg2, round 3 stress diagram of holding force plectane is shown in Figure 10,
In figure under the action of 6 power, round holding force plate 3 is in equilibrium state, and equilibrium equation is as follows：
∑ F=0, F1+F2+F3=F0+Fg1+Fg2 (1)
Σ M=0, F1×l1-(F2+F3)×l2=F0×e0+Fg1×(e0+e1)-Fg2×e2 (2)
The stress condition of rod piece Circular Rigid tube wall is divided into following several working conditions and is illustrated：Working condition (1)
As the eccentricity pressure F from outside that round holding force plate 3 is born0Greater than zero but it is less than the bulbs of pressure conjunction from 3 air bags 7
Power, and axle power (F suffered by every transmission rod1、F2、F3) be no more than initial axle power when, round holding force plate 3 is close to threaded cap 2,
And axial tension is transmitted to Circular Rigid pipe 1 by threaded cap 2, in this case, rod piece Circular Rigid pipe bears axial non-equal
Even tensile stress；The eccentricity pressure F from outside that working condition (2) is born when round holding force plate 30Greater than zero but it is less than from 3
The bulbs of pressure resultant force of a air bag 7, but have already appeared the axle power (F an of transmission rod1Or F2Or F3) be greater than gasbag pressure when, with
Corresponding fan-shaped holding force plate 6 will be to moving inside rod piece, compressing gasbag 7,7 volume-diminished pressure of air bag increases, and works as air bag
Pressure reaches balance when equal with corresponding transmission rod axle power, occurs between round holding force plate 3 and threaded cap 2 in this case
Axially are there is not tensile zone in zero pressure area, Circular Rigid tube wall；Working condition (3) is with eccentricity pressure F0Continue increase
Add, the case where being greater than gasbag pressure occurs in succession in remaining transmission rod axle power, and all sector holding force plates all will be to moving inside rod piece
It is dynamic, reach balance again when gasbag pressure is equal with corresponding transmission rod axle power, Circular Rigid pipe total cross-section is shaftless at this time
To tensile stress.Fan-shaped rigid pipe 5 is not subject to axial tension stress in working condition (1) (2) (3), and only bears circumferential drawing
Stress, and circumferential direction tensile stress suffered by the fan-shaped rigid pipe close apart from eccentricity pressure position is big.Working condition (3) can be by gas
Capsule is inflated to be changed to working condition (2), and working condition (2) can also be changed by inflating air bag to working condition (1), conversely,
When air bag pressure decline, working condition (1) will gradually change to working condition (2) (3).
In conclusion in three kinds of working conditions, though the rigid wall air bearing eccentrically compressed member of the present invention is by from outside
Eccentricity pressure effect, but the rod piece sector rigid pipe and Circular Rigid Guan Jun are not subject to compression, from external eccentric pressure
Power is first converted into the axial pressure of internal 3 fan-shaped rod pieces, and final completely by the high-pressure gasbag receiving inside rod piece, high pressure
Air bag further converts eccentricity pressure to the tensile stress of fan-shaped rigid pipe and Circular Rigid pipe, has reached and has made full use of rigid wall material
Expect tensile strength, improves the purpose of rod piece eccentric compression bearing capacity.
Claims (4)
1. a kind of rigid wall air bearing eccentrically compressed member, it is characterised in that including Circular Rigid pipe (1), fan-shaped rigid pipe (5), air bag
(7), round holding force plate (3), fan-shaped holding force plate (6), transmission rod (4), charging valve (8), barometer (9) and threaded cap (2；Circle
It sets in shape rigid pipe (1) there are three fan-shaped rigid pipe (5), is equipped with a fan-shaped air bag (7) in each sector rigid pipe (5), two
End is equipped with fan-shaped holding force plate (6)；Each sector air bag (7) is equipped with installation charging valve and barometrical communication port, charge valve
Door (8) and barometer (9) pass through Circular Rigid pipe (1) and air bag aeration aperture and barometer company on fan-shaped rigid pipe (5) respectively
Through-hole is connect with fan-shaped air bag (7)；The both ends of Circular Rigid pipe (1) are threadedly coupled with threaded cap (2), are equipped in threaded cap (2)
Round holding force plate (3) is equipped with transmission rod (4) between round holding force plate (3) and fan-shaped holding force plate (6), and transmission rod (4) respectively with fan
Shape holding force plate (6) and round holding force plectane (3) are hinged；The sector holding force plate and fan-shaped rigid inside pipe wall sliding contact；It is described
Round holding force plate and the sliding contact of Circular Rigid inside pipe wall；The reserved round holding force plate in the center of the threaded cap is connect with the external world
Through-hole, the threaded cap through-hole diameter are less than round holding force board diameter.
2. rigid wall air bearing eccentrically compressed member according to claim 1, it is characterised in that：Three air bag aeration apertures and three
A barometer intercommunicating pore is respectively uniformly distributed on the Circular Rigid pipe circumference and three fan-shaped rigid pipe compositions
Circumference on, each pair of air bag aeration aperture and barometer intercommunicating pore are axially corresponded in Circular Rigid pipe, the distance of center circle between the two
From not less than three times maximum diameter of hole.
3. rigid wall air bearing eccentrically compressed member according to claim 1, it is characterised in that：The sector rigid pipe and air bag
Central angle is 120 degree.
4. rigid wall air bearing eccentrically compressed member according to claim 1, it is characterised in that：The transmission rod is a rigid solid
Or hollow quarter butt structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611221342.1A CN106677427B (en) | 2016-12-27 | 2016-12-27 | A kind of rigid wall air bearing eccentrically compressed member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611221342.1A CN106677427B (en) | 2016-12-27 | 2016-12-27 | A kind of rigid wall air bearing eccentrically compressed member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106677427A CN106677427A (en) | 2017-05-17 |
| CN106677427B true CN106677427B (en) | 2018-11-16 |
Family
ID=58870436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611221342.1A Active CN106677427B (en) | 2016-12-27 | 2016-12-27 | A kind of rigid wall air bearing eccentrically compressed member |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106677427B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807405A (en) * | 1987-08-20 | 1989-02-28 | Borgquist Ronald B | Geodesic inflatable structure, and methods of constructing and utilizing same |
| JPH0842158A (en) * | 1994-07-28 | 1996-02-13 | Manabu Yamaguchi | Simple building to maintain whole shape by enclosing gas in skeleton |
| CN202108114U (en) * | 2011-06-03 | 2012-01-11 | 深圳市博德维建筑技术有限公司 | Installation structure of a dragline gas-film building cave mouth |
| CN102808452A (en) * | 2012-07-12 | 2012-12-05 | 唐戍鸣 | Node type inflated rack structure |
| CN202831759U (en) * | 2012-09-25 | 2013-03-27 | 中国电力工程顾问集团东北电力设计院 | Air inflation steel tube constructional element |
| CN102995748A (en) * | 2012-12-06 | 2013-03-27 | 北京工业大学 | Pneumatic membrane compression bar and manufacturing method thereof |
| CN203247770U (en) * | 2013-05-08 | 2013-10-23 | 山东科技大学 | Steel pipe barometric column |
| CN104120831A (en) * | 2014-08-11 | 2014-10-29 | 哈尔滨工业大学 | Large-span inflatable pre-stress truss string and construction method thereof |
-
2016
- 2016-12-27 CN CN201611221342.1A patent/CN106677427B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807405A (en) * | 1987-08-20 | 1989-02-28 | Borgquist Ronald B | Geodesic inflatable structure, and methods of constructing and utilizing same |
| JPH0842158A (en) * | 1994-07-28 | 1996-02-13 | Manabu Yamaguchi | Simple building to maintain whole shape by enclosing gas in skeleton |
| CN202108114U (en) * | 2011-06-03 | 2012-01-11 | 深圳市博德维建筑技术有限公司 | Installation structure of a dragline gas-film building cave mouth |
| CN102808452A (en) * | 2012-07-12 | 2012-12-05 | 唐戍鸣 | Node type inflated rack structure |
| CN202831759U (en) * | 2012-09-25 | 2013-03-27 | 中国电力工程顾问集团东北电力设计院 | Air inflation steel tube constructional element |
| CN102995748A (en) * | 2012-12-06 | 2013-03-27 | 北京工业大学 | Pneumatic membrane compression bar and manufacturing method thereof |
| CN203247770U (en) * | 2013-05-08 | 2013-10-23 | 山东科技大学 | Steel pipe barometric column |
| CN104120831A (en) * | 2014-08-11 | 2014-10-29 | 哈尔滨工业大学 | Large-span inflatable pre-stress truss string and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106677427A (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101602450A (en) | A kind of air bag type expanded shaft | |
| CN106677427B (en) | A kind of rigid wall air bearing eccentrically compressed member | |
| CN111473005B (en) | Interlayer cavity type hydraulic bag and energy accumulator with same | |
| CN206669039U (en) | A kind of nitrogen spring valve inside | |
| CN106351334B (en) | A kind of rigid wall air bearing axial compression rod piece | |
| CN202402547U (en) | Stretched buffer | |
| CN204282361U (en) | A kind of soft foundation inflation anchor bar of steel wire net | |
| CN110080592A (en) | A kind of multidimensional hinged ball drum type brake viscoplasticity Self-resetting shock-absorption device and its shock-dampening method | |
| CN209212497U (en) | Eccentric gear structure for vehicle-mounted inflator pump | |
| CN208845441U (en) | High-pressure piston type accumulator cylinder body | |
| CN114658846A (en) | Interlayer liquid filling type ultrahigh pressure equipment based on secondary pressurization | |
| CN207608810U (en) | A kind of vertical damping decompressor in bridge bottom end | |
| CN104359657B (en) | The inside and outside pressure cylinder of repeatable dismounting | |
| CN208027871U (en) | A kind of floated bipolar balanced compensated oil conservater of high-power transformer | |
| CN208343514U (en) | To roll-in crusher concave to pressure roller group structure | |
| CN208204001U (en) | The single structure for pressure test of heat exchanger tube | |
| CN212428282U (en) | Pressurization truss structure in hollow rod | |
| CN106428101B (en) | A kind of rolling stock and its weighing valve | |
| CN104948655B (en) | Air shock absorption device for elevator brake | |
| CN204228389U (en) | The inside and outside pressure cylinder of dismounting can be repeated | |
| CN206145424U (en) | Two measurement two gun type systems of aerifing of double -line | |
| CN201006947Y (en) | Fabric guide roll | |
| CN204986382U (en) | Double -deck gas cylinder | |
| US11402021B2 (en) | Lifting bellows | |
| CN209966815U (en) | High-strength low-temperature-resistant plastic chair wheel structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |